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* perfcounters: flush on setuid execIngo Molnar2008-12-161-0/+8
| | | | | | | | | Pavel Machek pointed out that performance counters should be flushed when crossing protection domains on setuid execution. Reported-by: Pavel Machek <pavel@suse.cz> Acked-by: Pavel Machek <pavel@suse.cz> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* perfcounters: release CPU context when exiting task countersIngo Molnar2008-12-141-2/+12
| | | | | | | | If counters are exiting via do_exit() not via filp close, then the CPU context needs to be released - otherwise future percpu counter creations might fail. Signed-off-by: Ingo Molnar <mingo@elte.hu>
* Merge branch 'linus' into perfcounters/coreIngo Molnar2008-12-1417-737/+794
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| * Merge branch 'merge' of ↵Linus Torvalds2008-12-131-0/+1
| |\ | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/jwboyer/powerpc-4xx * 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/jwboyer/powerpc-4xx: powerpc/40x: Add proper BOOTCFLAGS for cuboot-acadia
| | * powerpc/40x: Add proper BOOTCFLAGS for cuboot-acadiaJosh Boyer2008-12-111-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | The cuboot-acadia.c wrapper can cause assembler errors on some toolchains due to the lack of the proper BOOTCFLAGS. This adds the proper flags for the file. Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
| * | Merge branch 'i2c-for-linus' of git://jdelvare.pck.nerim.net/jdelvare-2.6Linus Torvalds2008-12-132-3/+3
| |\ \ | | | | | | | | | | | | | | | | | | | | * 'i2c-for-linus' of git://jdelvare.pck.nerim.net/jdelvare-2.6: i2c-highlander: Trivial endian casting fixes i2c-pmcmsp: Fix endianness misannotation
| | * | i2c-highlander: Trivial endian casting fixesHarvey Harrison2008-12-111-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Fixes sparse warnings: drivers/i2c/busses/i2c-highlander.c:95:26: warning: incorrect type in argument 1 (different base types) drivers/i2c/busses/i2c-highlander.c:95:26: expected restricted __be16 const [usertype] *p drivers/i2c/busses/i2c-highlander.c:95:26: got unsigned short [usertype] *<noident> drivers/i2c/busses/i2c-highlander.c:106:15: warning: incorrect type in assignment (different base types) drivers/i2c/busses/i2c-highlander.c:106:15: expected unsigned short [unsigned] [short] [usertype] <noident> drivers/i2c/busses/i2c-highlander.c:106:15: got restricted __be16 Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Cc: Ben Dooks <ben-linux@fluff.org> Acked-by: Paul Mundt <lethal@linux-sh.org> Signed-off-by: Jean Delvare <khali@linux-fr.org>
| | * | i2c-pmcmsp: Fix endianness misannotationHarvey Harrison2008-12-111-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | tmp is used as host-endian and is loaded from a be64, fix the cast and the endian accessor used. Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Cc: Ben Dooks <ben-linux@fluff.org> Signed-off-by: Jean Delvare <khali@linux-fr.org>
| * | | Merge branch 'for-linus' of git://git.kernel.dk/linux-2.6-blockLinus Torvalds2008-12-132-10/+18
| |\ \ \ | | | | | | | | | | | | | | | | | | | | * 'for-linus' of git://git.kernel.dk/linux-2.6-block: Commands needing to be retried require a complete re-initialization.
| | * | | Commands needing to be retried require a complete re-initialization.Alan D. Brunelle2008-12-122-10/+18
| | |/ / | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The test-unit-ready portion of this patch was causing boots to fail on my test machine (as in http://lkml.org/lkml/2008/12/5/161). With this patch in place, the system is booting reliably. Mike Anderson found the same problem in the hp_hw_start_stop code, and I applied the same solution in cdrom_read_cdda_bpc. Signed-off-by: Alan D. Brunelle <alan.brunelle@hp.com> Cc: Mike Anderson <andmike@linux.vnet.ibm.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
| * | | Merge branch 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linusLinus Torvalds2008-12-134-437/+638
| |\ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linus: MIPS: IP32: Update defconfig MIPS: Add missing calls to plat_unmap_dma_mem. MIPS: Kconfig: Fix the arch-specific header path MIPS: Use EI/DI for MIPS R2.
| | * | | MIPS: IP32: Update defconfigDavid Daney2008-12-121-436/+624
| | | | | | | | | | | | | | | | | | | | | | | | | Signed-off-by: David Daney <ddaney@caviumnetworks.com> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
| | * | | MIPS: Add missing calls to plat_unmap_dma_mem.David Daney2008-12-121-0/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | dma_free_noncoherent() and dma_free_coherent() are missing calls to plat_unmap_dma_mem(). This patch adds them. Signed-off-by: David Daney <ddaney@caviumnetworks.com> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
| | * | | MIPS: Kconfig: Fix the arch-specific header pathDmitri Vorobiev2008-12-121-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The header path in the help text for the RUNTIME_DEBUG config option is obsolete and needs to be updated to match the new location of architecture-specific header files. While at it, fix the spelling mistake. Signed-off-by: Dmitri Vorobiev <dmitri.vorobiev@movial.fi> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
| | * | | MIPS: Use EI/DI for MIPS R2.David Daney2008-12-121-0/+10
| | |/ / | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | For MIPS R2, use the EI and DI instructions to enable and disable interrupts. Signed-off-by: Tomaso Paoletti <tpaoletti@caviumnetworks.com> Signed-off-by: David Daney <ddaney@caviumnetworks.com> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
| * | | console ASCII glyph 1:1 mappingIngo Brueckl2008-12-131-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | For the console, there is a 1:1 mapping of glyphs which cannot be found in the current font. This seems to be meant as a kind of 'emergency fallback' for fonts without unicode mapping which otherwise would display nothing readable on the screen. At the moment it affects all chars for which no substitution character is defined. In particular this means that for all chars (>= 128) where there is no iso88591-1/unicode character (e.g. control character area) you'll get the very strange 1:1 mapping of the (cp437) graphics card glyphs. I'm pretty sure that the 1:1 mapping should only affect strict ASCII code characters, i.e. chars < 128. The patch limits the mapping as it probably was meant anyway. Signed-off-by: Ingo Brueckl <ib@wupperonline.de> Acked-by: H. Peter Anvin <hpa@zytor.com> Cc: Egmont Koblinger <egmont@uhulinux.hu> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| * | | unicode table for cp437Ingo Brueckl2008-12-131-6/+6
| |/ / | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | There is a major bug in the cp437 to unicode translation table. Char 0x7c is mapped to U+00a5 which is the Yen sign and wrong. The right mapping is U+00a6 (broken bar). Furthermore, a mapping for U+00b4 (a widely used character) is missing even though easily possible. The patch fixes these, as well as it provides a few other useful mappings. The changes are as follows: 0x0f (enhancement) enables a sort of currency symbol 0x27 (bug) enables a sort of acute accent which is a widely used character 0x44 (enhancement) enables a sort of icelandic capital letter eth 0x7c (major bug) corrects mapping 0xeb (enhancement) enables a sort of icelandic small letter eth 0xee (enhancement) enables a sort of math 'element of' Signed-off-by: Ingo Brueckl <ib@wupperonline.de> Acked-by: H. Peter Anvin <hpa@zytor.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| * | Revert "radeonfb: accelerate imageblit and other improvements"Linus Torvalds2008-12-106-280/+127
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This reverts commit b1ee26bab14886350ba12a5c10cbc0696ac679bf, along with the "fixes" for it that all just caused problems: - c4c6fa9891f3d1bcaae4f39fb751d5302965b566 "radeonfb: fix problem with color expansion & alignment" - f3179748a157c21d44d929fd3779421ebfbeaa93 "radeonfb: Disable new color expand acceleration unless explicitely enabled" because even when disabled, it breaks for people. See http://bugzilla.kernel.org/show_bug.cgi?id=12191 for the latest example. Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Acked-by: David S. Miller <davem@davemloft.net> Cc: Krzysztof Halasa <khc@pm.waw.pl> Cc: James Cloos <cloos@jhcloos.com> Cc: "Rafael J. Wysocki" <rjw@sisk.pl> Cc: Krzysztof Helt <krzysztof.h1@poczta.fm> Cc: Jean-Luc Coulon <jean.luc.coulon@gmail.com> Cc: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | | perfcounters: fix lapic initializationIngo Molnar2008-12-141-2/+2
| | | | | | | | | | | | | | | | | | Fix non-working NMI sampling in certain bootup scenarios. Signed-off-by: Ingo Molnar <mingo@elte.hu>
* | | perfcounters, x86: fix sw counters on non-PMC CPUsIngo Molnar2008-12-141-1/+1
| | | | | | | | | | | | | | | | | | | | | Make perf_max_counters default to at least 1 - this allows the sw counters to be used. Signed-off-by: Ingo Molnar <mingo@elte.hu>
* | | perfcounters: fix non-intel-perfmon CPUsIngo Molnar2008-12-141-0/+10
| | | | | | | | | | | | | | | | | | Do not write MSR_CORE_PERF_GLOBAL_CTRL on CPUs where it does not exist. Signed-off-by: Ingo Molnar <mingo@elte.hu>
* | | perfcounters: add nr-of-faults counterIngo Molnar2008-12-141-0/+51
| | | | | | | | | | | | | | | | | | | | | | | | | | | Impact: add new feature, new sw counter Add a counter that counts the number of pagefaults a task is experiencing. Signed-off-by: Ingo Molnar <mingo@elte.hu>
* | | perfcounters: add task migrations counterIngo Molnar2008-12-144-6/+61
| | | | | | | | | | | | | | | | | | | | | | | | | | | Impact: add new feature, new sw counter Add a counter that counts the number of cross-CPU migrations a task is suffering. Signed-off-by: Ingo Molnar <mingo@elte.hu>
* | | perfcounters: add context switch counterIngo Molnar2008-12-142-2/+53
| | | | | | | | | | | | | | | | | | | | | | | | | | | Impact: add new feature, new sw counter Add a counter that counts the number of context-switches a task is doing. Signed-off-by: Ingo Molnar <mingo@elte.hu>
* | | perfcounters: fix task clock counterIngo Molnar2008-12-141-4/+23
| | | | | | | | | | | | | | | | | | | | | | | | Impact: bugfix Update the task clock counter to the new math. Signed-off-by: Ingo Molnar <mingo@elte.hu>
* | | perfcounters: implement "counter inheritance"Ingo Molnar2008-12-143-51/+228
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Impact: implement new performance feature Counter inheritance can be used to run performance counters in a workload, transparently - and pipe back the counter results to the parent counter. Inheritance for performance counters works the following way: when creating a counter it can be marked with the .inherit=1 flag. Such counters are then 'inherited' by all child tasks (be they fork()-ed or clone()-ed). These counters get inherited through exec() boundaries as well (except through setuid boundaries). The counter values get added back to the parent counter(s) when the child task(s) exit - much like stime/utime statistics are gathered. So inherited counters are ideal to gather summary statistics about an application's behavior via shell commands, without having to modify that application. The timec.c command utilizes counter inheritance: http://redhat.com/~mingo/perfcounters/timec.c Sample output: $ ./timec -e 1 -e 3 -e 5 ls -lR /usr/include/ >/dev/null Performance counter stats for 'ls': 163516953 instructions 2295 cache-misses 2855182 branch-misses Signed-off-by: Ingo Molnar <mingo@elte.hu>
* | | perfcounters: restructure x86 counter mathIngo Molnar2008-12-144-178/+137
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Impact: restructure code Change counter math from absolute values to clear delta logic. We try to extract elapsed deltas from the raw hw counter - and put that into the generic counter. Signed-off-by: Ingo Molnar <mingo@elte.hu>
* | | x86: implement atomic64_t on 32-bitIngo Molnar2008-12-141-0/+218
| | | | | | | | | | | | | | | | | | | | | | | | | | | Impact: new API Implement the atomic64_t APIs on 32-bit as well. Will be used by the performance counters code. Signed-off-by: Ingo Molnar <mingo@elte.hu>
* | | Merge branch 'x86/irq' into perfcounters/coreIngo Molnar2008-12-12116-430/+825
|\ \ \ | | | | | | | | | | | | ( with manual semantic merge of arch/x86/kernel/cpu/perf_counter.c )
| * | | x86: hardirq: introduce inc_irq_stat()Hiroshi Shimamoto2008-12-125-30/+11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Impact: cleanup Introduce inc_irq_stat() macro and unify irq_stat accounting code. Signed-off-by: Hiroshi Shimamoto <h-shimamoto@ct.jp.nec.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | | Merge commit 'v2.6.28-rc8' into x86/irqIngo Molnar2008-12-12549-5337/+9942
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| | * | Linux 2.6.28-rc8Linus Torvalds2008-12-101-1/+1
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| | * | Merge branch 'sched-fixes-for-linus' of ↵Linus Torvalds2008-12-101-0/+2
| | |\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'sched-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: sched: CPU remove deadlock fix
| | | * | sched: CPU remove deadlock fixBrian King2008-12-091-0/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Impact: fix possible deadlock in CPU hot-remove path This patch fixes a possible deadlock scenario in the CPU remove path. migration_call grabs rq->lock, then wakes up everything on rq->migration_queue with the lock held. Then one of the tasks on the migration queue ends up calling tg_shares_up which then also tries to acquire the same rq->lock. [c000000058eab2e0] c000000000502078 ._spin_lock_irqsave+0x98/0xf0 [c000000058eab370] c00000000008011c .tg_shares_up+0x10c/0x20c [c000000058eab430] c00000000007867c .walk_tg_tree+0xc4/0xfc [c000000058eab4d0] c0000000000840c8 .try_to_wake_up+0xb0/0x3c4 [c000000058eab590] c0000000000799a0 .__wake_up_common+0x6c/0xe0 [c000000058eab640] c00000000007ada4 .complete+0x54/0x80 [c000000058eab6e0] c000000000509fa8 .migration_call+0x5fc/0x6f8 [c000000058eab7c0] c000000000504074 .notifier_call_chain+0x68/0xe0 [c000000058eab860] c000000000506568 ._cpu_down+0x2b0/0x3f4 [c000000058eaba60] c000000000506750 .cpu_down+0xa4/0x108 [c000000058eabb10] c000000000507e54 .store_online+0x44/0xa8 [c000000058eabba0] c000000000396260 .sysdev_store+0x3c/0x50 [c000000058eabc10] c0000000001a39b8 .sysfs_write_file+0x124/0x18c [c000000058eabcd0] c00000000013061c .vfs_write+0xd0/0x1bc [c000000058eabd70] c0000000001308a4 .sys_write+0x68/0x114 [c000000058eabe30] c0000000000086b4 syscall_exit+0x0/0x40 Signed-off-by: Brian King <brking@linux.vnet.ibm.com> Acked-by: Peter Zijlstra <peterz@infradead.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| | * | | fix mapping_writably_mapped()Hugh Dickins2008-12-101-6/+9
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Lee Schermerhorn noticed yesterday that I broke the mapping_writably_mapped test in 2.6.7! Bad bad bug, good good find. The i_mmap_writable count must be incremented for VM_SHARED (just as i_writecount is for VM_DENYWRITE, but while holding the i_mmap_lock) when dup_mmap() copies the vma for fork: it has its own more optimal version of __vma_link_file(), and I missed this out. So the count was later going down to 0 (dangerous) when one end unmapped, then wrapping negative (inefficient) when the other end unmapped. The only impact on x86 would have been that setting a mandatory lock on a file which has at some time been opened O_RDWR and mapped MAP_SHARED (but not necessarily PROT_WRITE) across a fork, might fail with -EAGAIN when it should succeed, or succeed when it should fail. But those architectures which rely on flush_dcache_page() to flush userspace modifications back into the page before the kernel reads it, may in some cases have skipped the flush after such a fork - though any repetitive test will soon wrap the count negative, in which case it will flush_dcache_page() unnecessarily. Fix would be a two-liner, but mapping variable added, and comment moved. Reported-by: Lee Schermerhorn <Lee.Schermerhorn@hp.com> Signed-off-by: Hugh Dickins <hugh@veritas.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| | * | | Merge branch 'to-linus' of ↵Linus Torvalds2008-12-101-1/+9
| | |\ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/frob/linux-2.6-roland * 'to-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/frob/linux-2.6-roland: tracehook: exec double-reporting fix
| | | * | | tracehook: exec double-reporting fixRoland McGrath2008-12-091-1/+9
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The patch 6341c39 "tracehook: exec" introduced a small regression in 2.6.27 regarding binfmt_misc exec event reporting. Since the reporting is now done in the common search_binary_handler() function, an exec of a misc binary will result in two (or possibly multiple) exec events being reported, instead of just a single one, because the misc handler contains a recursive call to search_binary_handler. To add to the confusion, if PTRACE_O_TRACEEXEC is not active, the multiple SIGTRAP signals will in fact cause only a single ptrace intercept, as the signals are not queued. However, if PTRACE_O_TRACEEXEC is on, the debugger will actually see multiple ptrace intercepts (PTRACE_EVENT_EXEC). The test program included below demonstrates the problem. This change fixes the bug by calling tracehook_report_exec() only in the outermost search_binary_handler() call (bprm->recursion_depth == 0). The additional change to restore bprm->recursion_depth after each binfmt load_binary call is actually superfluous for this bug, since we test the value saved on entry to search_binary_handler(). But it keeps the use of of the depth count to its most obvious expected meaning. Depending on what binfmt handlers do in certain cases, there could have been false-positive tests for recursion limits before this change. /* Test program using PTRACE_O_TRACEEXEC. This forks and exec's the first argument with the rest of the arguments, while ptrace'ing. It expects to see one PTRACE_EVENT_EXEC stop and then a successful exit, with no other signals or events in between. Test for kernel doing two PTRACE_EVENT_EXEC stops for a binfmt_misc exec: $ gcc -g traceexec.c -o traceexec $ sudo sh -c 'echo :test:M::foobar::/bin/cat: > /proc/sys/fs/binfmt_misc/register' $ echo 'foobar test' > ./foobar $ chmod +x ./foobar $ ./traceexec ./foobar; echo $? ==> good <== foobar test 0 $ ==> bad <== foobar test unexpected status 0x4057f != 0 3 $ */ #include <stdio.h> #include <sys/types.h> #include <sys/wait.h> #include <sys/ptrace.h> #include <unistd.h> #include <signal.h> #include <stdlib.h> static void wait_for (pid_t child, int expect) { int status; pid_t p = wait (&status); if (p != child) { perror ("wait"); exit (2); } if (status != expect) { fprintf (stderr, "unexpected status %#x != %#x\n", status, expect); exit (3); } } int main (int argc, char **argv) { pid_t child = fork (); if (child < 0) { perror ("fork"); return 127; } else if (child == 0) { ptrace (PTRACE_TRACEME); raise (SIGUSR1); execv (argv[1], &argv[1]); perror ("execve"); _exit (127); } wait_for (child, W_STOPCODE (SIGUSR1)); if (ptrace (PTRACE_SETOPTIONS, child, 0L, (void *) (long) PTRACE_O_TRACEEXEC) != 0) { perror ("PTRACE_SETOPTIONS"); return 4; } if (ptrace (PTRACE_CONT, child, 0L, 0L) != 0) { perror ("PTRACE_CONT"); return 5; } wait_for (child, W_STOPCODE (SIGTRAP | (PTRACE_EVENT_EXEC << 8))); if (ptrace (PTRACE_CONT, child, 0L, 0L) != 0) { perror ("PTRACE_CONT"); return 6; } wait_for (child, W_EXITCODE (0, 0)); return 0; } Reported-by: Arnd Bergmann <arnd@arndb.de> CC: Ulrich Weigand <ulrich.weigand@de.ibm.com> Signed-off-by: Roland McGrath <roland@redhat.com>
| | * | | | lib/idr.c: Fix bug introduced by RCU fixManfred Spraul2008-12-101-1/+7
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The last patch to lib/idr.c caused a bug if idr_get_new_above() was called on an empty idr. Usually, nodes stay on the same layer. New layers are added to the top of the tree. The exception is idr_get_new_above() on an empty tree: In this case, the new root node is first added on layer 0, then moved upwards. p->layer was not updated. As usual: You shall never rely on the source code comments, they will only mislead you. Signed-off-by: Manfred Spraul <manfred@colorfullife.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| | * | | | MN10300: Give correct size when reserving interrupt vector tableAkira Takeuchi2008-12-101-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Give the correct size when reserving the interrupt vector table. It should be a page not a single byte. Signed-off-by: Akira Takeuchi <takeuchi.akr@jp.panasonic.com> Signed-off-by: David Howells <dhowells@redhat.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| | * | | | MN10300: Fix __put_user_asm8()Akira Takeuchi2008-12-101-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Fix __put_user_asm8() by jumping to the end label (3:) from the exception handler, rather than jumping back to retry the second store instruction (label 2:). Signed-off-by: Akira Takeuchi <takeuchi.akr@jp.panasonic.com> Signed-off-by: David Howells <dhowells@redhat.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| | * | | | MN10300: Fix the preemption resume_kernel() routineAkira Takeuchi2008-12-101-1/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Fix the preemption resume_kernel() routine by inverting the test to see whether interrupts are off (IM7 is all enabled, not all disabled). Furthermore, interrupts should be disabled on entry to resume_kernel() so that they're correctly set for jumping to restore_all() and doing the need reschedule test. Signed-off-by: Akira Takeuchi <takeuchi.akr@jp.panasonic.com> Signed-off-by: David Howells <dhowells@redhat.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| | * | | | MN10300: Discard low-priority Tx interrupts when closing an on-chip serial portAkira Takeuchi2008-12-101-0/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Discard low-prioriy Tx interrupts when closing an MN10300 on-chip serial port. The MN10300 on-chip serial port uses three interrupts to manage its serial ports: (1) A very high priority interrupt that drives virtual DMA for Rx. (2) A very high priority interrupt that drives virtual DMA for Tx. (3) A normal priority virtual interrupt that does the normal UART interrupt stuff and is shared between Rx and Tx. mn10300_serial_stop_tx() only disables the high priority Tx interrupt. It doesn't also disable the normal priority one because it is shared with Rx. However, the high priority interrupt may interrupt local_irq_disabled() sections, and so may have queued up a low priority virtual interrupt whilst the UART driver is asking for the Tx interrupt to be disabled. The result of this can be an oops when we try to process the interrupt in mn10300_serial_transmit_interrupt() as port->uart.info and port->uart.info->tty may have gone away. To deal with this, if either of those pointers is NULL, we make sure the high-priority Tx interrupt is disabled and discard the interrupt. The low priority interrupt is disabled by the mn10300_serial_pic irq_chip table. Signed-off-by: Akira Takeuchi <takeuchi.akr@jp.panasonic.com> Signed-off-by: David Howells <dhowells@redhat.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| | * | | | MN10300: vmlinux.lds.S cleanup - use PAGE_SIZE, PERCPU macrosCyrill Gorcunov2008-12-101-12/+10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Include the linux/page.h header into the MN10300 kernel linker script thus allowing us to use PAGE_SIZE macro instead of a numeric constant. Also use the PERCPU macro instead of an explicit section definition. Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com> Signed-off-by: David Howells <dhowells@redhat.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| | * | | | Merge git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6Linus Torvalds2008-12-102-13/+41
| | |\ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | * git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6: crypto: api - Disallow cryptomgr as a module if algorithms are built-in
| | | * | | | crypto: api - Disallow cryptomgr as a module if algorithms are built-inHerbert Xu2008-12-102-13/+41
| | | |/ / / | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | If we have at least one algorithm built-in then it no longer makes sense to have the testing framework, and hence cryptomgr to be a module. It should be either on or off, i.e., built-in or disabled. This just happens to stop a potential runaway modprobe loop that seems to trigger on at least one distro. With fixes from Evgeniy Polyakov. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
| | * | | | Merge branch 'for-linus' of ↵Linus Torvalds2008-12-102-3/+27
| | |\ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6 * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6: PCIe: ASPM: Break out of endless loop waiting for PCI config bits to switch PCI: stop leaking 'slot_name' in pci_create_slot
| | | * | | | PCIe: ASPM: Break out of endless loop waiting for PCI config bits to switchThomas Renninger2008-12-091-3/+26
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Makes a Compaq 6735s boot reliably again. It used to hang in the loop on some boots. Give the link one second to train, otherwise break out of the loop and reset the previously set clock bits. Cc: stable@vger.kernel.org Signed-off-by: Thomas Renninger <trenn@suse.de> Signed-off-by: Shaohua Li <shaohua.li@intel.com> Signed-off-by: Matthew Garrett <mjg59@srcf.ucam.org> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
| | | * | | | PCI: stop leaking 'slot_name' in pci_create_slotAlex Chiang2008-12-091-0/+1
| | | |/ / / | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In pci_create_slot(), the local variable 'slot_name' is allocated by make_slot_name(), but never freed. We never use it after passing it to the kobject core, so we should free it upon function exit. Cc: stable@kernel.org Signed-off-by: Alex Chiang <achiang@hp.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
| | * | | | Merge branch 'release' of ↵Linus Torvalds2008-12-108-86/+171
| | |\ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6 * 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6: [IA64] SN: prevent IRQ retargetting in request_irq() [IA64] Fix section mismatch ioc3uart_init()/ioc3uart_submodule [IA64] Clear up section mismatch for ioc4_ide_attach_one. [IA64] Clear up section mismatch with arch_unregister_cpu() [IA64] Clear up section mismatch for sn_check_wars. [IA64] Updated the generic_defconfig to work with the 2.6.28-rc7 kernel. [IA64] Fix GRU compile error w/o CONFIG_HUGETLB_PAGE [IA64] eliminate NULL test and memset after alloc_bootmem [IA64] remove BUILD_BUG_ON from paravirt_getreg()
| | | * | | | [IA64] SN: prevent IRQ retargetting in request_irq()John Keller2008-12-091-1/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | With the introduction of the generic affinity autoselector, irq_select_affinity(), IRQs are now being retargetted, using a default mask, via the request_irq() path. This results in all IRQs targetted at CPU 0. SN Altix assigns affinity in the SN PROM, and does not expect that to be changed as part of request_irq(). Set the IRQ_AFFINITY_SET flag to prevent request_irq() from resetting affinity. Signed-off-by: John Keller <jpk@sgi.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
generated by cgit v1.1 at 2025-01-13 05:34:35 +0000